Side panel added

LibraryViewer/public/WavPlayer.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <iostream>
+#include <thread>
+#include <alsa/asoundlib.h>
+
+class WavPlayer {
+public:
+    WavPlayer();
+    ~WavPlayer();
+
+    void loadSong(const char* filePath);
+    void playSong();
+    void stopSong();
+    void setVolume(float volume);
+    float getProgress() const;
+    float getDurationSec() const;
+    void setProgress(float newProgress);
+
+private:
+    void playbackThreadFunction();
+
+    snd_pcm_t* handle;
+    std::thread* playbackThread;
+    bool isPlaying;
+    float progress;
+};
+
+void example();